dzhokhar tsarnaev, in surgery in beth israel hospital in boston, after police say a homeowner noticed a trail of blood in his back yard. >> the men who found him at the boat said he was covered with blood. we assume those injuries occurred the evening before. there was an exchange of gunfire at the boat. i don't know if he was struck. >> now these are some of the images taken right after his capture. you can see him here, well, he's out on the pavement there, or the near -- near the area of the boat. he is here in an ambulance, before heading to the hospital. adam house lie, joining us live now with more. adam? >> reporter: yeah, gregg, he was brought here under guard to this hospital, beth israel in boston, where he remains under guard. just about every entrance in and in and out of the hospital and the entire medical compound here at beth israel has a number of police officer in just about every location, across the street, like the children's hospital hospital you will find increased security. we were told he was in surgery, multiple injuries, one to his hand and one to his head. w